Matthew von ctjlin



, M. van OULIN. Machines for Fnr'lming Seamless Cans. N0; 143,735, Patented Oct-14,1873.

Inventor.

Attorney V AM. Pmm-umommc rm 1 mm; PRacns) UNITED STATES PATENT OFFICE.

MATTHEW VON OULIN, or PHILADELPHLA, PENNSYLVANIA, ASsIeNoE, BY MESNE ASSIGNMENTS, TO EWALD nIEDEL AND JOSEPHINE E. ROEBLING,

OF SAME PLACE.

IMPROVEMENT I N MACHINE$ FOR/FORMING SEAMLESS CANS.

Specification forming part of Letters Patent No.143fi35, dated October 14, 1873; application filed March 17, 1873.

To all whom it may concern:

Be it known that I, MATTHEW VON CULIN,

of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Process and Apparatus for Making Seamless Cans; and I do hereby declare the following to be a full, clear', and exact description of the same, reference being had to the accompanying drawing, and to the letters of reference marked thereon.

The nature of my invention consists in a process and apparatus for manufacturing seamless cans with vertical sides, and of a height less than, equal to, or exceeding, the

' through my machine.

My process for making the peculiar cans above mentioned consists of two operations: First, the blank is formed into a vessel with flaring sides, of the form shown in Fig. 3. This is done by a machine now in common use for forming vessels of that shape, and hence I do not claim this part by itself as my invention. Second, the blank or vessel formed as above is placed in a suitable apparatus, and by a single blow of a plunger it is forced through a die, the bend given to the blank in the first step of the process being retained, which draws the flaring sides out, so that when the vessel leaves the die it is, so to say, transformed into a can with vertical Sides, and

said sides of a height equal to or exceeding the diameter of the can. 7

The apparatus-used by me to carry out this process is constructed as follows:

A represents the die,the interior of which is made flaring, as shown, except a short portion from a to b at the lower end, and this portion is made vertical. Below this, at I), is formed a rabbet or offset, as shown particularly in Fig. 2, and hereinafter more fully de scribed. The blank B, formed according to the first part of my process, is placed in the die A, and the blank-holder O is set in the blank and held down tight. The exterior surface of the blank-holder corresponds with the flaring sides of the die and blank, and it holds the metal against the die to prevent its wrinkling while it is being pushed through the straight part of the die by the plunger. 1) represents the plunger, which comes down through the blank holder, and presses the blank B into the straight part a b of the die, andas it passes by the corner a the blank becomes straight and forms to the plunger.

When the plunger strikes the blank, it pulls the same gradually from between the die and the blank holder, and as it comes out and passes over the corner a it is perfectly smooth. After it is entirely through past the corner I), the plunger rises and the completed can strikes said corner, and is thereby pulled from the plunger.

By this process, and by the use of my apparatus, articles of sheet-iron, or tinned sheet iron, may be manufactured with sides at right angle to the bottom, as deep as the diameter 5 and by this I can also make them deeper than the diameter. Furthermore, it is a much more economical way for making shallower goods than any heretofore used, because with other machines making shallow ware many blanks are broken, while with mine none are broken,

unless there is a flaw in the metal.

With my machine I can make this class of goods-that is, seamless cans, &c., having vertical sidesfrom any kind of metal, and of any depth whatever, first having formed the metal in a vessel with flaringsides by the machine now in common use.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, isv .1. The method herein described for forming seamless cans or other were with vertical sides at the bottom, in combination with the blankfrom sheet metal, by first forming a vessel holder 0 and plunger D, constructed as de with flaring sides, and. then, by one operation scribed, and for the purpose specified.

of a plunger, forcing the same through a die In testimony whereof Ihave hereunto s1gned of the construction described, and retaining my name.

the same bend in the blank, substantially as MATTHEW VON CULIN. set forth. Witnesses:

2. The flaring-mouthed die A, having the JNo. M. MGCURDY, vertical portion a b, and a shoulder or offset R0131. MGOURDY. 

